I took the radio out and found every wire with the cleanest cut. Someone just snipped every wire on this stereo (is a four channel hooked to four speakers too) and installed it right back into the dash. What a mess! I went through the headache of hooking all these wires back up, grounding the stereo (it wasn't grounded before) and I ran a 14 gauge wire from the radio positive to that test socket you mentioned. Nothing. Not even the clock. I ran more wire from the stereo directly to the battery and still nothing. There were a total of three fuses running to this stereo and none are blown....yet the radio just seems completely fried. Oh well. I just reinstalled the stereo until I can get another one.
BTW - thanks for the image of the fuse box...that is exactly what I needed! I KNEW I should have gotten a Chilton's!